Key technology of HX-NGS adsorption for treating organic matter in orchid carbon wastewater

Abstract

In this article, COD, volatile phenol and ammonia nitrogen concentrations of the wastewater from semicarbon are reported as 38,000; 6,400 and 5,700 mg/L, respectively. According to the field test, when the pH of the wastewater is 9, the field test temperature is 20 °C, the adsorption time is 30 min and the optimal dosing ratio of nitrogen-doped gasification slag (HX-NGS) to the wastewater is 1:4, HX-NGS has the best removal effect on COD, volatile phenol and ammonia nitrogen in the wastewater from the semicarbon. The removal rates of COD, volatile phenol and ammonia nitrogen are 94, 91 and 85%, respectively, and the concentrations of the remaining COD, volatile phenol and ammonia nitrogen are 2,280, 576 and 855 mg/L, respectively, after regeneration, the material HX-NGS has a good effect on the treatment of the wastewater from the semicarbon. The reuse rate of the adsorption material is at least eight times. The adsorption effect of the material HX-NGS conforms to the mechanism law of dynamics and thermodynamics. HIGHLIGHTS Physical extraction is adopted without adding chemical agents, which will not lead to secondary pollution of water in the treatment link with no increase in solid and liquid wastes.; Moreover, the extraction materials can be recycled for use, with a strong adsorption capacities for oil and phenol.; The first adsorption can handle about 80% of polyphenol, SS, etc.;

Keywords

• ammonia nitrogen
• cod
• parallel test
• reaction conditions
• semicarbon wastewater
• volatile phenol